handlers/pgsql: make more use of the new lib/vserver functionality

[matthijs/upstream/backupninja.git] / handlers / pgsql

diff --git a/handlers/pgsql b/handlers/pgsql
index 8d8f0c78eecf035d21ec324d182708241a31489a..8629260720b60d0475bcadcb7b6727e8eecb4d66 100644 (file)
--- a/handlers/pgsql
+++ b/handlers/pgsql
@@ -1,3 +1,4 @@
+# -*- mode: sh; sh-basic-offset: 3; indent-tabs-mode: nil; -*-
 #
 # PostgreSQL handler script for backupninja
 #
@@ -9,35 +10,57 @@ getconf vsname
 
 localhost=`hostname`
 
-# If vservers are configured, decide if the handler should
-# use them or if it should just operate on the host
-
-if [ "$vservers" == "yes" ]
-    then
-    if [ ! -z $vsname ]
-       then            
-       info "Using vserver '$vsname'"
-       usevserver=1
-    else
-       info "No vserver name specified, actions will be performed on the host"
-    fi
+# If vservers are enabled, check that $vsname exists, and decide if the
+# handler should use it or if it should just operate on the host.
+local usevserver=no
+if [ $vservers_are_available = yes ]; then
+   if ! vservers_exist "$vsname" ; then
+      fatal "The vserver given in vsname ($vsname) does not exist."
+   else
+      info "using vserver '$vsname'"
+      usevserver=yes
+   fi
 fi
 
-# Check to make sure that the specified vserver exists
-if [ $usevserver ]
-    then
+# As needed, make sure that :
+#   * the specified vserver is running
+#   * the specified vserver or host has the needed executables
+if [ $usevserver = yes ]; then
+    info "examining vserver '$vsname'"
     vroot="$VROOTDIR/$vsname"
-    [ -d $vroot ] || fatal "vserver '$vsname' does not exist at '$vroot'"
+    # is it running ?
+    running=`$VSERVERINFO $vsname RUNNING`
+    if [ "$running" = "1" ]; then
+       if [ "$databases" == "all" ]; then
+           [ -x "$vroot`$VSERVER $vsname exec which $PGSQLDUMPALL`" ] || \
+               fatal "Can't find $PGSQLDUMPALL in vserver $vsname."
+       else
+           [ -x "$vroot`$VSERVER $vsname exec which $PGSQLDUMP`" ] || \
+               fatal "Can't find $PGSQLDUMP in vserver $vsname."
+       fi
+    else
+       fatal "vserver $vsname is not running."
+    fi
+else
+    if [ "$databases" == "all" ]; then
+       [ -x "`which $PGSQLDUMPALL`" ] || \
+           fatal "Can't find $PGSQLDUMPALL."
+    else
+       [ -x "`which $PGSQLDUMP`" ] || \
+           fatal "Can't find $PGSQLDUMP."
+    fi
 fi
 
 # create backup dir, the vroot variable will be empty if no vsname was specified
 # and will proceed to operate on the host
-[ -d $vroot$backupdir ] || mkdir -p $vroot$backupdir
+[ -d $vroot$backupdir ] || (debug "mkdir -p $vroot$backupdir"; mkdir -p $vroot$backupdir)
 [ -d $vroot$backupdir ] || fatal "Backup directory '$vroot$backupdir'"
 
 # give backup dir the good uid and permissions
-# (in respect to the vserver, if $usevserver)
-pguid=`grep '^postgres:' $vroot/etc/passwd | awk -F: '{print $3}'`
+# (in respect to the vserver, if $usevserver = yes)
+pguid=`getent passwd postgres | awk -F: '{print $3}'`
+[ -n "$pguid" ] || \
+    fatal "No user called postgres`[ $usevserver = no ] || echo \" on vserver $vsname\"`."
 debug "chown $pguid $vroot$backupdir"
 chown $pguid $vroot$backupdir
 debug "chmod 700 $vroot$backupdir"
@@ -45,15 +68,15 @@ chmod 700 $vroot$backupdir
 
 # if $databases = all, use pg_dumpall
 if [ "$databases" == "all" ]; then
-    if [ $usevserver ]; then
-       execstr="$VSERVER $vsname exec su - postgres -c $PGSQLDUMPALL > $vroot$backupdir/${vsname}.sql"
+    if [ $usevserver = yes ]; then
+       execstr="$VSERVER $vsname exec su - postgres -c $PGSQLDUMPALL > $backupdir/${vsname}.sql"
     else
        execstr="su - postgres -c $PGSQLDUMPALL > $backupdir/${localhost}-all.sql"
     fi
     debug "$execstr"
     if [ ! $test ]; then
-       output=`$execstr 2>&1`
-       code=$?
+       output=`$execstr 2>&1`
+       code=$?
        if [ "$code" == "0" ]; then
            debug $output
            info "Successfully finished dump of pgsql cluster"
@@ -66,9 +89,9 @@ if [ "$databases" == "all" ]; then
 # else use pg_dump on each specified database
 else
     for db in $databases; do
-       if [ $usevserver ]
+       if [ $usevserver = yes ]
            then
-           execstr="$VSERVER $vsname exec su - postgres -c $PGSQLDUMP $db > $vroot$backupdir/${db}.sql"
+           execstr="$VSERVER $vsname exec su - postgres -c $PGSQLDUMP $db > $backupdir/${db}.sql"
        else
            execstr="su - postgres -c $PGSQLDUMP $db > $backupdir/${db}.sql"
        fi